The bottomless pit effect requires a few mirrors, and if the picture is any indication, it looks pretty great. If you like building stuff and you've got a little time this weekend, this bottomless pit (complete with pathetic, frightened child voice) would be a great DIY Halloween project. After all, what Halloween would be complete without the timeless Halloween classic, "Bottomless Pit with Scared Child Inside"? Check out your fellow readers suggestions for more on putting together a great DIY haunted house; alternately, Lawrence has several more DIY Halloween projects you might want to check out.